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While the lawmakers acknowledge Brown's memorandum with the U.S. Department of Homeland Security was targeted at improving public safety rather than enforcing immigration law, they wrote, "We can no longer tolerate using our state resources to support government agencies detaining young children involuntarily ripped from their parents."

Brown spokesman Evan Westrup said the administration would continue to "assess and review this, just as we have since personnel were originally mobilized back in April."

Editor's note: This story was updated at 3:54 p.m. on June 25, 2018 to add Evan Westrup's comment.